Draw-off device for explosive liquids.



L. KESSLER. DRAW OPF DEVICE FOR EXPLOSIVE LIQUIDS. APPLICATION FILEDJUNE 14, 1909. 962,846, 7 Patented June 28, 1910.

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L. KESSLER. DRAW-OFF DEVICE FOR EXPLOSIVB LIQUIDS. APPLICATION FILEDJUNE 14, 1909.

L. KESSLER.

DRAW-OFF DEVICE FOR EXPLOSIVE LIQUIDS. APPLICATION rum) JUNE 14, 1909.

962,846, Patented June 28, 1910.

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L. KESSLBR. DRAW-OFF DEVICE FOR EXPLOSIVE LIQUIDS.

APPLICATION FILED JUNE 14, 1909.

962,846. Patented June 28, 1910.-

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LOUIS KESSLER, OF CHICAGO, ILLINOIS.

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Specification of Letters Patent.

Application filed June 14, 1909. Serial No. 502,032.

To all whom it may concern: I

Be it known that I, LOUIS KEssLnR, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Draw-Ofl Devices for ExplosiveLiquids, of which the following is a specification.

My invention relates to improvements in draw-off devices for explosiveliquids and more especially to that class of tanks used by retaildealers for the purpose of holding highly explosive and volatile oils,such for instance as gasolene, benzin, naphtha and the like, to enablevarying-quantities to be withdrawn from time to timefor supplyingcustomers.

My object is to provide a construction of draw-off device for explosiveliquids of the character referred to whereby means shall be afforded forreducing to the minimum the possibility of loss of the oil, eitherthrough evaporation or other cause of waste, and as well, to effectuallyguard against the possibility of explosion of the contents, and providefor the convenient and economical handling of the oil.

In the accompanying drawings which illustrate my improvedconstruct1onFigure 1 is a view in side elevation of a tank equipped withmy improvement; Fig. 2 is an enlarged view in sectional elevation takenon the irregular line 2, Fig. 1; Fig. 3 is a still further enlarged viewof the lower or valved-end of a suction pipe taken on line 3, Fig. 2;Fig. 4 is an enlarged broken view in vertical section of the pump,measuring andoverflow device taken on line 4, Fig. 2, and Fig. 5 is abroken view in vertical section in the same longitudinal plane as Fig.4, though at the opposite end of the tank and showing a valved safetyand vent-device.

A tank 6, which may be of any desired shape, though preferably ofcylindrical form as shown in the drawings, is stably supported on asuitable base 7, and adjacent to one of its ends is provided with athreaded ring 8 attached to the top of the tank in an opening therein. Asafety-device 9 having a hollow head 10 is securedto the tank by athreaded engagement of the head with the ring. The head is provided witha circumferential series of openings 11 which are covered by a metalscreen 12 (such as wiregauze), and has a downwardly projecting,

. hollow, annular flange 13 from which depends a tube 14 equipped at itslower end with a metal screen 15, preferably of the same material as thescreen 12. The head also has extending from it a thimble 16 which, toprovidefor the insertion of the screen, is made as a separate piece andscrewed into the head, and upon the upper end of the thimble is screweda cap 17 provided with a series of holes 18 and a central aperture 19. Asafety-valve 20 provided with a sealing-disk 21, preferably of leather,has a depending hollow stem 22 which passes loosely through the aperture19 and carries at'its end a flanged tip 23 to confine between it and thecap 17 a spring 24' surrounding the stem, for the purpose of seating thevalve upon the cap to normally close the holes 18. Within the stem isformed a valve-seat 25 and a vent, or air-intake, or check valve 26 isnormally held against the seat by a spring 27 to close the passagethrough the stem. As oil is drawn from the tank, in the mannerhereinafter explained, the partial vacuum thereby produced opens theintake-valve to Patented June 28, 1910.

permit air to pass into the tank and replace the oil being withdrawn,and as the vacuum is relieved, the spring 27 acts instantly to againsealthe valve. The safety-device thus described forms the subject of myapplication Serial No. 499,57 7 filed June 1, 1909.

In longitudinal alinement with the ring 8, and secured in lace in likemanner, is a similar ring 28 or seating a flanged'ca 29 screwed into itand forming a part 0 an oil-draw-off device; and a gasket 30 is providedas packing between the cap and ring,

to seal the connection. A pump 31 of the preferred ordinary oscillatorytype having two similar nipples 32 surmounts the cap and iscon-necteditherewith through one of the nipples which is screwed intothe .cap, and a suction-pipe 33in alinement with the nipple extends fromthe cap into close proximity to the bottom of the tank'where it isprovided with a gravity-seating valve 34, Fig. 3.

Screwed upon the other nipple is a fitting.

35 provided with a disk 36 having an annular flange 37 and from thecenter of the disk' rises an oil-inlet pipe 38 surmounted by a glassmeasuring-dome 39 having a graduated measuringvscale 40, the glass beingsealed about its circumferential edge on the disk within the flange 37.By providing the pipe 38 as described, it insures a constant andunvarying column of oil above 'isino the pump and by introducing oilinto the dome in this manner, undue agitation is prevented, with theresult that the level of the oil is more clearly defined while the pumpration.

The tting 35 is provided with a draw-ofl cock 41 and a hole 42 is formedin the disk 36 so that oil pumped into the dome may be drawn therefromthrough the cock to be discharged through a nozzle 43. On the cap 29 isformed a boss 44 into which is screwed one end of a T-coupling 45 whichcarries at its outer end a can-support 46 centrally disposed relative tothe nozzle 43, and from which rises an annular flange 47 forming a cup.A valve-seat 48 is formed in a passage 49 through the body-portion ofthe support and a valve 50 is normally held against the seat'by a s ring51. This spring surrounds the stem 0 the valve and is confined betweenthe valve and a cap 52 which is screwed into the body-portion of thecan-support. The valve is provided with an upwardly-projecting spider orwingextension 53 to which is attached a perforated concave disk 54 whichforms the rest proper for a receptacle (not shown), to be filled fromthe nozzle 43.

It will be apparent that when a can or other receptacle for holding oilis laced upon the disk 54 to be filled, the va ve 50 wlll beautomatically opened either by the weight of the can alone, or as itsweight is,

supplemented by that of the inflowing oil. Should the oil from the domeoverflow the can, such overflow will run down the can and pass eitherthrough the erforations in the disk or over its edge an be conductedback into the tank through a passage 55 leading from thevalved-passa e49 through the coupling and ca 29 and finally be discharged into the tathrough a small pipe 56 depending from the cap 29. The passage from thepipe 56 is completely covered by a metal screen 57 (such as wire gauze),to prevent the possibility of a flame passing through it into the tankto i 'te the contents and explode the can. ading from the fitting 35 isa by-pass pipe 58 connected with the T-coupling 45 and containing adrain-cock 59, so that oil from the dome may be drawn oil through thisconnection into the tank, for the purpose hereinafter explained.

As shown in Fig. 4, the pump is provided with a face-plate 60 having astufling-box 61 through which the stem or shaft 62 passes,

' and the latter is equipped at its outer end with an operating-handle63. In Fig. 2, the pump is represented with the face-plate removed andshowin pump-blades 64 extending from the sha and two similar segmentalstationary abutments 65, between which the blades oscillate. This typeof pump being old in the art and of well known construction andoperation, it is unnecesialrys utizitii describe it lhereifn in detail.It will cient to exp ain or resent urposes that,-as shown by dottedliiies in fl ig. 2, a passage 66 leads from the suction-pipe 33 to thelowermost abutment 65 and a pasage 67 leads from the uppermost abutment65 to the pipe 38. It wi be understood that the passages through theabutments are suitably valved as is the practice in pumps of this typeand that the blades contain the usual openings throu h them so that asthey are caused to osc' ate between the abutments through the rocking ofthe shaft, oil will be sucked throu h, the pipe 33 and be dischargedthroug the pipe 38 into the dome 39.

A tank equi with my invention is used in the f0 owing described manner:With the cocks 41 and 59 closed, oil is pumped from the tank into-thedomeuntil the esired quantity has been introduced therein; should theoil, however, be in excess of the amount required, as shown by thescale, such excess may be drawn oil through the drain-cock 59. Areceptacle is then placed upon the disk 54 to open the valve 50 and byturning the cock 41 to the o n position, the contents of the dome are edinto the rece tacle through the nozzle 43, and as before escribed, inthe event of overflowing of the receptacle, waste of such overflow isprevented, since it is conducted back into the tank. Obviously, the aircontained in the dome will be compressed by the inflowing oil, but inpractice it has been found that such compression is negligible, sinceample space is left in the dome to permit of such compremion, as oil isnever intended to rise in the dome to a level above the 38.

Upon each withdrawal of o from the tank, a partial vacuum will therebybe formed therein and as this overcomes the force of the spring 27 thevalve 26 will be opened and air rush into the tank to relieve thevacuum, replace the oil withdrawn and prevent the tank from becomingair-bound. Should an undue pressure be generated in the tank as in caseof fire, such pressure will be relieved through the safety-valve 20. Asthe overflow oil or escapin gas is very liable to become ignited, theame is prevented from entering the tank or back-firing and the resultantexplosion of the can guarded against. This is accomplished by coveringthe openings 11, pipes 14 and 56 with a. metal screen (such aswire-gauze). Upon the evacuation of the tank it may be again filled'through the ring 8 upon first removing the safety-device.

-What I claim as new and desire to secure by Letters Patent is- 1. Incombination with a tank of the character described, a draw-ofl deviceconnected therewith and comprising a pump, a

suction-pipe extending into the tank and communicating with the pump, ameasuring dome into which the pump discharges and a draw-01f cockleading from the dome, of a can-support extending from said device andcontaining a passage communicating with the tank, a spring-pressed valvein sald support, and a can-rest carried by the valve, whereby pressureexerted upon the can-rest will open the valve to said passage, for thepurpose set forth.

2. In combination with a tank of the character described, a draw-oildevice connected therewith and comprising a pump, a suction-pipeextending into the tank and communicating with the pump, a measuringdome into which the pump discharges, provided with a passage leadingtherefrom, and

' a draw-ofi' cock in said passage,'a by-pass communicating with saidpassage and with the tank, said by-pass being closed to the atmosphereand a cock in said by-pass, for the purpose set forth. a

communicating with the pump, a measuring dome into WhlCh the pumpdischarges, provided with a passage leading therefrom, and a draw-offcock in said passage, of a can-support extending from said device andcontaining a passage communicating with the tank, a by-passcommunicating with said first-named passage and with said secondnamedpassage, a cock in said by-pass, a. spring-pressed valve in saidsupport, and -a can-rest carried by the valve, whereby pressure exertedupon the can-rest will open the valve to said passage, for the purposeset forth.

LOUIS KESSLER.

In presence of CHAS. E. GAYLoRn, R. A. SCHAEFER.

